More than likely it is salt. Most likely you live in an area where they salt the roads or near the ocean. The road spray get on the bonnet and dries causing the white powder.
Powder (movie Powder) Snow White
White Lady White Powder was created in 1980.
The white plates/Patches are tubes that are located on the underside, of the woodlouse.
Avicennia alba
Same as ours.
its just a type of ash
The white powder on pita bread is flour.
The color of a vole is brown or grey. The underside is white.
baking powder
It could be anything, but recently anthrax has been the white powder of choice.
Gun powder is white and it is flammable there is your answer !!
That isn't white powder. It is called rosin and it helps you not slip on the stage